Repression in China has deepened during the past few months.

Answer: Option B

Repression : the action of subduing someone or something by force.
Regeneration : the action or process of regenerating or being regenerated.
Liberation : the action of setting someone free from imprisonment, slavery, or oppression; release.
Agitation : a state of anxiety or nervous excitement.
Expression : the action of making known one's thoughts or feelings.

Antonym of Repression is Liberation